SV platform dependency builds

/** @file patest_leftright.c

        @ingroup test_src

        @brief Play different tone sine waves that 

                alternate between left and right channel.

        The low tone should be on the left channel.

        @author Ross Bencina <rossb@audiomulch.com>

        @author Phil Burk <philburk@softsynth.com>

*/

/*

 * $Id$

 *

 * This program uses the PortAudio Portable Audio Library.

 * For more information see: http://www.portaudio.com

 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files

 * (the "Software"), to deal in the Software without restriction,

 * including without limitation the rights to use, copy, modify, merge,

 * publish, distribute, sublicense, and/or sell copies of the Software,

 * and to permit persons to whom the Software is furnished to do so,

 * subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR

 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF

 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */

/*

 * The text above constitutes the entire PortAudio license; however, 

 * the PortAudio community also makes the following non-binding requests:

 *

 * Any person wishing to distribute modifications to the Software is

 * requested to send the modifications to the original developer so that

 * they can be incorporated into the canonical version. It is also 

 * requested that these non-binding requests be included along with the 

 * license above.

 */

#include <stdio.h>

#include <math.h>

#include "portaudio.h"

#define NUM_SECONDS   (8)

#define SAMPLE_RATE   (44100)

#define FRAMES_PER_BUFFER  (512)

#ifndef M_PI

#define M_PI  (3.14159265)

#endif

#define TABLE_SIZE   (200)

#define BALANCE_DELTA  (0.001)

typedef struct

{

    float sine[TABLE_SIZE];

    int left_phase;

    int right_phase;

    float targetBalance; // 0.0 = left, 1.0 = right

    float currentBalance;

} paTestData;

/* This routine will be called by the PortAudio engine when audio is needed.

** It may called at interrupt level on some machines so don't do anything

** that could mess up the system like calling malloc() or free().

*/

static int patestCallback( const void *inputBuffer,

                           void *outputBuffer,

                           unsigned long framesPerBuffer,

                           const PaStreamCallbackTimeInfo* timeInfo,

                           PaStreamCallbackFlags statusFlags,

                           void *userData )

{

    paTestData *data = (paTestData*)userData;

    float *out = (float*)outputBuffer;

    unsigned long i;

    int finished = 0;

    /* Prevent unused variable warnings. */

    (void) inputBuffer;

    for( i=0; i<framesPerBuffer; i++ )

    {

                // Smoothly pan between left and right.

                if( data->currentBalance < data->targetBalance )

                {

                        data->currentBalance += BALANCE_DELTA;

                }

                else if( data->currentBalance > data->targetBalance )

                {

                        data->currentBalance -= BALANCE_DELTA;

                }

                // Apply left/right balance.

        *out++ = data->sine[data->left_phase] * (1.0f - data->currentBalance);  /* left */

                *out++ = data->sine[data->right_phase] * data->currentBalance;  /* right */

        data->left_phase += 1;

        if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;

        data->right_phase += 3; /* higher pitch so we can distinguish left and right. */

        if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;

    }

    return finished;

}

/*******************************************************************/

int main(void);

int main(void)

{

    PaStream *stream;

    PaStreamParameters outputParameters;

    PaError err;

    paTestData data;

    int i;    

    printf("Play different tone sine waves that alternate between left and right channel.\n");

    printf("The low tone should be on the left channel.\n");

    /* initialise sinusoidal wavetable */

    for( i=0; i<TABLE_SIZE; i++ )

    {

        data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );

    }

    data.left_phase = data.right_phase = 0;

    data.currentBalance = 0.0;

    data.targetBalance = 0.0;

    err = Pa_Initialize();

    if( err != paNoError ) goto error;

    outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */

    if (outputParameters.device == paNoDevice) {

      fprintf(stderr,"Error: No default output device.\n");

      goto error;

    }

    outputParameters.channelCount = 2;       /* stereo output */

    outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */

    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;

    outputParameters.hostApiSpecificStreamInfo = NULL;

    err = Pa_OpenStream( &stream,

                         NULL,                  /* No input. */

                         &outputParameters,     /* As above. */

                         SAMPLE_RATE,

                         FRAMES_PER_BUFFER,

                         paClipOff,      /* we won't output out of range samples so don't bother clipping them */

                         patestCallback,

                         &data );

    if( err != paNoError ) goto error;

    err = Pa_StartStream( stream );

    if( err != paNoError ) goto error;

    printf("Play for several seconds.\n");

    for( i=0; i<4; i++ )

        {

                printf("Hear low sound on left side.\n");

                data.targetBalance = 0.01;

        Pa_Sleep( 1000 );

                printf("Hear high sound on right side.\n");

                data.targetBalance = 0.99;

        Pa_Sleep( 1000 ); 

        }

    err = Pa_StopStream( stream );

    if( err != paNoError ) goto error;

    err = Pa_CloseStream( stream );

    if( err != paNoError ) goto error;

    Pa_Terminate();

    printf("Test finished.\n");

    return err;

error:

    Pa_Terminate();

    fprintf( stderr, "An error occured while using the portaudio stream\n" );

    fprintf( stderr, "Error number: %d\n", err );

    fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );

    return err;

}